Special Cap Bolt Hexagon Socket Undercut Non Standard Steel Gallery Special Cap Bolt Hexagon Socket Undercut Non Standard Steel Cold Forming, Machining Parts Special Cap Bolt Hexagon Socket Undercut Non Standard Steel Ric Sun2020-07-01T00:59:11-07:00 Special cap bolt is the bolt with a cap head and non-standard thread. Undercut often used at the [...] Special Cap Bolt Hexagon Socket Undercut Non Standard SteelRic Sun2020-07-01T00:59:11-07:00